232 



THE GEOLOGIST. 



Current Classification of Fossil Sponges.— The following classi- 

 fication, certainly very erroneous, appears to be, as nearly as may be 

 that which is current amongst British geologists. I he Editor would 

 be much obliged by communications as to proposed and necessary amend- 

 ments. 



I. OcELLARIDjE. 



Coscinopora. 



Guettardia. 



Ventriculites {Ocellaria). 

 Brachiolites. 



Cephalites (Cribrospongia ; Tragos, Gold- 

 fuss, nou Schweg.). 

 Creloptychiura. 

 Retispongia. 

 Thalaraospongia. 

 Paleeospongia. 

 Porospongia. 

 Goniospongia. 



II. SlPHONIDjE. 



Eudea (Scyphia). 



Perispongia. 



Camerospongia. 



Verticillites. 



Cuemidium. 



Siphonia (Halirrhoa ; Polypothecia) . 



Hippalimus (Scyphia). 



Choanites. 



Jerea (according to Morris). 

 Paramoudra. 



III. Lymnoreid^e. 



Lymnorea. 



Tremospongia. 



Leiospongia. 



Actinospongia. 



Rhizospongia. 



Mammillopora (Lymnorea). 



Marginospongia. 



Pleurospongia. 



Heinispongia. 



Verrucospongia ( = Manon). 

 Sparsispougia ( = Stromatopora). 

 Stellispongia. 



V. AMORPHOSPON«ID,E. 



Cupnlospongia. 



Plocoscophia. 



Meandrospongia. 



Amorphospongia (Achilleum) . 



Turonia. 



Strematopora. 



Spongia. 



VI. HaLICHONDRIDjE. 



Cliona(^'oa; Entobia). 



Halichondria. 



Tboosa. 



Spongilla. 



Alcyonella. 



Geodia. 



Tethya.^ 



Gv?L\\t\& t (Lcucalia) . 

 Dunstervillia. 



VII. Clionid^e. 



Cliona. 

 Talpina. 



VIII. Uncertain. 



Conis. 



Coscinopora. 

 Steganodictyum. 

 Udotea. 



f Steganodictyum. 

 Stromatopora. 



collections they have formed, 



IV. Sparsispongidje. 

 Chenendopora (Manon). 

 Porospongia. 



Jerea (according to If Orbigny). 



Intimations from collectors as to the 

 would also especially oblige. — S. J. M. 



Coal-beds of the Nottingham Collieries. — Eastwood Colliery. — ■ 

 The coal is of excellent quality, free from dust, throwing out great heat ; 

 durable and clean in burning, and said to be very superior for general 

 household purposes. Watnall, Beauvale, and Brinsley Collieries. — The 

 " Comb Coal," the highest workable seam, is 2 feet 6 inches thick, and is 

 used for household purposes in the midland counties of England. It is a 

 free and bright burning coal, leaving a small quantity of red ashes. East- 

 wood and Coimanhay Collieries. — The deep soft coal is most extensively 

 worked for household purposes ; it is about 180 yards below the " top hard 



